<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container {
            width: 500px;
            height: 500px;
            border: 1px solid red;
            border-radius: 50%;
            position: relative;
        }
        .container div {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) rotate(30deg) translateY(-200px) rotate(-30deg);
        }
    </style>
</head>
<body>
    <div class="container">
        <div>1</div>
    </div>
</body>
</html>